<!DOCTYPE html>
<html>
<head>
    <title>工作记事本</title>
    <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.3.0/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
    <div class="container mt-4">
        <h1 class="mb-4">工作记事本</h1>
        {% block content %}{% endblock %}
    </div>
</body>
</html>